Steam-locomotive.



stew. WYMAN. STEAM LOUOMOTIVB.

APPLICATION FILED NOV. 21, 1913.

1,091,178. Patented Mar. 24, 1914 hairless? eerie GEQIEGE W. WYIKIAN, 01B \UILMIIVGTON, DEIAWARE.

STEAM-LOCOMGTIVE.

insi es.

Specification of Letters Patent.

Patented Mar. 2a. 1914.

application filed November 21, 1913. Serial No. 802,205.

To all whom it may concern:

Be it known that I, Gaonon W. l VYMAN, a citizen of the United States, residing at liVilmington, in the county of Newcastle and State o't' Delaware, have invented a certain new and useful Improvement in Steam-Lo- -comotives, of which the following is a specification. I,

The invention relates to devices for supplying steam in limited quantities to the cylinders of the locomotive when the latter lubricant in the valves and cylinders.

in operating engines equipped With super-heaters it is the common practice when drifting, to hold the throttle-valve cracked or in such position as to provide a small opening to allow a small amount of steam to pass through the dry pipe to the steamchests and cylinders, relying upon the en.- gineer to determine the proper volume and thus adding to his many duties.

'lhe object of the present invention is to provide simple, economical, and easily applied means, independent of the throttle, by which the desired supply of steam at low pressure will be automatically delivered to the steam-chests and cylinders of the locomotive when driiting or making a stop,

without requiring the attention of the engineer, and which may be controlled and regulated to supply steam at any predetermined pressure.

The invention. consists in certain novel arrangements of parts by which the above objects are attained, to be hereinafter described and claimed.

The accompanying drawings form a part of this specification and show approved means for carrying out the invention.

Figure 1 is a longitudinal section of a portion of a locomotive, partly in elevation, having a welbknown form of superheater, and equipped with the invention. Fig. 2 is an elevation on a larger scale showing the connections used in applying the invention. Fig. 3 is a front elevation of certain portions in the interior of the smoke-box of a loco.-

motive using saturated steam-and of a gen eral type, equipped with the invention.

Similar letters ofreference indicate like I parts in all the figure.

Referring to Figs. 1 and 2, A. is the boiler, B the dry-pipe extending'through the front tube sheet A and joined to the header C of a well-l rnown type of superheater having units C lying in the large upper tubes A of'the boiler. Steam pipes D from the header C lead superheated steam to the steam-chests l) and cylinders 1). Within the cab A and located on the rear-sheet or back head A of the boiler is the turret. or bridge A from which extend the various steam connections, not shown, for the injector, lubricators, and other devices as usual. be understoodto be of approved construction.

L is a pipe controlled by a valve 1., leading from the turret A to a pressure reduclug-valve L adapted to be adjusted to receive steam atboilerpressure and deliver it at a greatly reduced pressure to the pipe M,

preferably of larger diameter than the pipe L and forming a continuation ofthelatter,

leading to the inlet 0 of the header 0 or to any convenient point on the header, from which the steam delivered will be led through the superheater and thence to the steam-chest D and cylinder D.

By means of the pipe L steam at boiler pressure will be delivered to the reducingvalve L at all times and the latter deliver steam at a greatly reduced pressure, as twenty five pounds for example, through the pipe M to the steam-chests when the throttle is closed and the locomotive drifting or stopped. The steam thus supplied is sufii cient to till the cylinders and valve passages and prevent carbonizing of the lubricant, and to avoid the formation of a vacuum.

The operation is performedautomatically.

and requiresno attention from the engineer other than occasional inspection.

When the throttle is opened and steam at high pressure is supplied to thedry-pipe and superheater, the flow through the pipe L M ceases by reason of the back pressure produced in the pipe L M by the difference in pressures, and in order to protect the reducingvalve L from damage due to the excessive back pressure, a check-valve M is located in the pipe M and arranged to be closed by such difference in pressures.

If it be preferable to supply saturated steam to the steam chests and cylinders, the pipe M may be connected to the header C at All these parts may the ordinary or any" Q i I 1,091,178

the point indicated by dotted lines at c, or at any convenient point beyond the return connections of the units C andlthe supply of low pressure steam will thus be led directly to the steam chests without traversing the superheater.

Fig. 3 shows the front end of a boiler of a common type Without a superheater and With the pipe M corresponding to the pipe M of the preceding fi'gures, connected to the T-head B at the junction of the dry-pipe with the steam pipes D D The action in this arrangement is the same essentially as before, and the apparatus is in all respects similar to that shown in Fig. 2.

It Will be'understood that the pipe L may be connected to the boiler at any convenient high point instead of to the turret A and that the pipe M may lead to any point from Which its steam will reach the steam chest and cylinder.

The deviceis inexpensive and is easily installedonv locomotives of any type.

The pipes L and M and valves L L and M may be of any suitable construction and placed at any easily accessible or convenient locations relatively to the boiler and cab.

I claim v1. In a steam locomotive, a boiler, steam chests and cylinders, a superheater, a dry pipe delivering steam to said superheater,

steam'pipes from said superheater to said steam chests, an auxiliary pipe from said. boilerto, said superheater, a reducing-valve in said pipe, the latter and said reducingvalve arranged to receive steam at high pressure from said boiler and deliver to said superheat'er at a reduced pressure.

2. In a. steam locomotive, a boiler, steam chests and cylinders, a superheatcr, a dry pipe delivering steam to said superheater, steam pipes from s'aid superheater to said steam chests, an auxiliary pipe from said boiler to said superheater, a reducing-valve in said pipe, and a check-valve in said pipe between said reducing-valve and said superheater, said pipe and valves arranged to receive steam at high pressure from said boiler and deliver it to said superheater at areduced pressure.

3. In a steam locomotive having a boiler, steam chests, cylinders, and steam connections from said boiler to said steam chests, an auxiliary pipe delivering steam from said boiler to said steam chests, a reducing valve in said pipe, a checlevalvc in said pi pe between said reducing-valve and said steam chests, and a valve in said pipe bet-ween said boiler and reducingw'alve, for controlling the admission of steam to said pipe, the lat ter and its valves arranged to receive steam at high pressure from said boi'lerfl and d eliver itto said steam chests at-a reduced pressure.

In testimony that (I '(claim the invention above set forth I aiiix my signature, in presence of tWo Witnesses.

GEORGE W. W YMAN.

\Vitnesses CHARLES R. SEA LE, HENRY L. WASHBURN. 

